Coke-feeding device with housing for a dry cooling installation for coke

ABSTRACT

Coke feed device with housing (6) for a coke dry cooling installation which is allocated to a cooling shaft (41) and consists of a stationary hopper (1) with an extraction line (9), a movable hopper (2), a movable, liftable and lowerable cooling shaft closure (8) and the housing (6) containing the movable hopper (2) and the cooling shaft closure (8) which are arranged on a joint chassis (22) running on rails (49). The movable hopper (2, 200, 201) is fitted with a distribution bell (3, 4) and a liftable and lowerable sealing ring (11) and the movable cooling shaft closure (8) fitted with a sealing ring (55) is integrated into a lifting and lowering device (15) and the housing (6, 600, 601) takes the form of a hood clear of the floor or with apertures in the walls (45, 450, 451, 46, 460, 461) for a limited secondary air supply.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a national phase application corresponding toPCT/EP91/02515 filed 27 Dec. 1991 and based, in turn, upon a Germanapplication P 41 02 245.6 filed 24 Jan. 1991 under the InternationalConvention.

FIELD OF THE INVENTION

The invention relates to a coke-feeding device with housing for a drycooling installation for coke, which is assigned to a cooling shaft andcomprises a stationary hopper with suction line, a movable hopper, amovable, liftable and lowerable cooling shaft closure, as well as thehousing containing the movable hopper and the cooling shaft closuremounted on a common chassis running on rails.

BACKGROUND OF THE INVENTION

The drawback of this installation known from DE-OS 30 04 175 is thatduring the charging of the cooling shaft with glowing coke a particleseparation occurs which leads to an uneven gas flow in the coolingshaft, resulting in a longer dwelling time. A further disadvantage isthe additionally required sealing measures. Finally it isdisadvantageous that the entire housing is so closely connected with thecooling shaft and the stationary hopper that during the coke chargingoperation, no air can enter the housing, which can result in a certainexplosion risk for the suction line.

It is the object of the invention to provide coke-feeding deviceavoiding the drawbacks of the prior art, so that no separation occursduring the charging operation. Still another object is to provide acoke-feeding device with the improved ability to lift and lower thecooling shaft closure is the penetration of a certain amount ofsecondary air into the housing.

SUMMARY OF THE INVENTION

This problem is solved according to the invention by providing themovable hopper with a distribution bell and a liftable and lowerablesealing ring, as well as by integrating the movable cooling shaftclosure equipped with a sealing ring in a lifting and lowering mechanismand by designing the housing as a hood with bottom clearance or withopenings in the walls in order to allow a limited penetration ofsecondary air.

The apparatus according to the invention also provides fastening thedistribution bell of the movable hopper to a pipe segment which issupported by a crossbeam.

According to another embodiment the distribution bell arranged in themovable hopper is fastened to a cross-shaped support. This structureallows smaller overall dimensions of the movable hopper and the housing.

Preferably the liftable and lowerable sealing ring moves guides and hasa lever transmission consisting of lever arms fastened to shafts andweighted down with counterweights, whereby guide rollers arranged on theshafts cooperate with a cam plate in order to lift and lower the sealingring.

According to a further embodiment the housing is made in two parts,whereby movable longitudinal and transversal sides are assigned to astationary hood lid, the movable hopper and the cooling shaft closurebeing solidly integrated therein.

BRIEF DESCRIPTION OF THE DRAWING

The above and other objects, features, and advantages will become morereadily apparent from the following description, reference being made toto the accompanying drawing in which:

FIG. 1 is a partially sectioned elevational front view of a coke-feeding

FIG. 2 is a partially sectioned elevational side view of the deviceshown in FIG. 1;

FIG. 3 is a view analogous to the one shown in FIG. 2 but with a coolingshaft closure shown in a sealing position;

FIG. 4 is the sealing ring arrangement for the movable hopper shown in aclosed position;

FIG. 5 is the sealing ring arrangement for the movable hopper in an openposition;

FIG. 6 is another embodiment of the device according to the

FIGS. 7 and 8 are respective side elevational views of the device shownin FIG. 6 with the shaft closure respectively in working and sealingpositions;

FIG. 9 is an actuation device for the up and down movable sealing ringin a perspective view;

FIGS. 10 and 11 are perspective views of the device of FIG. 9 in raisedand lowered positions; stationary hopper as well as with a two-parthousing whose lower part is movable;

FIG. 12 is still another embodiment of the coke-feeding device accordingto the invention with a closable stationary hopper as well as with atwo-part housing whose lower part is movable;

FIGS. 13 and 14, are side elevational views of the device seen in FIG.12 with the lower part of the housing shown respectively inworking/sealing positions; and

FIG. 15 is an actuation device for the hopper closure in a perspectiveview.

SPECIFIC DESCRIPTION

FIGS. 1 and 2 show a coke-feeding device according to the invention,consisting of a stationary hopper 1 acting in conjunction with a movablehopper 2, which in this illustration is in working position for charginga cooling shaft 41 with glowing coke and is located under the stationaryhopper 1. In the movable hopper 2 a distribution bell 3 is arranged,which is fastened to a crossbeam 39 via a pipe segment 40. The crossbeam39 is anchored in a wall of the movable hopper 2.

The glowing coke coming from a transport container reaches first thestationary hopper 1 and from there the movable hopper 2, where with theaid of the distribution bell 3 an even coke distribution is achieved,avoiding thereby a particle separation in the cooling shaft 41, whichwould otherwise lead to disadvantages regarding the dimensions andoperation of cooling shaft 41.

The stationary hopper is supported by a support structure 7 (FIG. 1),mounted on a platform 42 which is arranged in the upper area of andaround the cooling shaft 41. To the stationary hopper 1 a suction line 9is connected, which aspires the dust generated while the glowing coke ischarged, in order to eliminate dust emissions. Also for the eliminationof dust emissions serves a housing 6 arranged in the lower area of thestationary hopper 1 and surrounding it sealingly with its hood lid 43.Longitudinal sides 45 and transversal sides 46 of the hood-shapedhousing 6 end above the surface 47 of platform 42, so that air slots 44are left, through which air can be aspired into the inner space of thehousing 6, in order to prevent the escape of dust emissions. Instead ofair slots 44 openings 44a which are shown diagrammatically in FIGS. 2, 3and 13, 14 can be provided in the longitudinal sides 45 and/or thetransversal sides 46.

The housing 6 surrounds a chassis 48 which can move on rails 49 by meansof wheels, respectively rollers 56 and which carries on one hand anextension 59 with a movable hopper 2 and on the other hand a coolingshaft closure 8 and a pertaining lift and lowering mechanism 15. Thechassis 48 is connected with a drive unit 14, namely in the example overa telescopic linkage 50, by means of which the chassis can be moved fromthe position shown in FIG. 2 to the position shown in FIG. 3. Thishappens when the charging operation of the cooling shaft 41 with acharge of glowing coke is finished. Before the start of this operation,a liftable and lowerable sealing ring 11, immersed in water lute 10filled with water 13 (FIG. 4), has been brought from this sealingposition to the release position (FIG. 5). The water lute 10 is arrangedabove the shaft head 51 of the cooling shaft 41. In its sealing positionthe sealing ring 11 rests via a flexible sealing element 12 against anannular collar 52 of the movable hopper 2. After the sealing ring 11 islifted, the movable hopper 2 is moved from its work position accordingto FIG. 2 in its rest position according to FIG. 3 and at the same timethe cooling shaft closure 8 is moved from its rest position (FIG. 2) ina sealing position (FIG. 3). During this operation the dust emissionsexiting the cooling shaft 41 remain inside the housing 6 and are aspiredfrom there by the suction line 9. The suction operation has to becontinued until the cooling shaft 41 is closely sealed by the coolingshaft closure 8.

The lifting and lowering device 15 for the cooling shaft closure 8consists of one or more crossrails 53, which are guided and moved up anddown in guide and lift elements 54.

After the cooling shaft closure has been brought from its rest position(FIG. 2) to the cooling shaft 41 as a result of the actuation of thetelescopic linkage 50 shown in the example, it can be lowered in itssealing position (FIG. 3) by the lifting and lowering mechanism 15.Thereby at the same time a sealing ring 55 mounted on the cooling shaftclosure 8 is dipped into the water lute 10, in order to create anemission-free seal for the shaft 41. After the sealing position isassumed, the suction action of the dust aspiration lines 9 can beinterrupted.

As soon as the next container with glowing coke is brought to thestationary hopper 1, the suction action of the dust aspiration lines 9is started again, the cooling shaft closure 8 is lifted again by thelifting and lowering mechanism 15 from its sealing position (FIG. 3)into its moving position and then returned to its rest position (FIG.2). At the same time the movable hopper 2 reaches again its workposition under the stationary hopper 1 (FIG. 2) and after the liftableand lowerable sealing ring 11 is lowered, the next charge of glowingcoke can be introduced in the cooling shaft 41.

In FIGS. 6, 7 and 8 another embodiment of the coke-feeding device isshown. As can be seen there, it consists of a stationary hopper 100connected with an enlarged portion 57, sealingly surrounded by a housing600 formed by a hood lid 430, longitudinal sides 450 and transversalsides 460. The hopper enlargement 57 corresponds with a movable hopper200, which is fastened via support 590 on the chassis 48 and whichcomprises a distribution bell 4 fastened to a cross-shaped supportanchored in the wall of the movable hopper 200.

Construction and operation of the embodiment of the coke-feeding deviceaccording to FIGS. 6, 7 and 8 basically correspond to embodimentaccording to FIGS. 1, 2 and 3. However, the smaller overall dimensionsof the movable hopper 200 and of the housing 600 require less material.

A preferred embodiment of the liftable and lowerable sealing ring 11 isshown in a perspective view in FIGS. 9 to 11. In the example the sealingring 11 is guided in rod-like guides 23 and carries holding plates 69,to which chains 26 are fastened, which at one end lead to lever arms 24and at the other end carry counterweights 25. The lever arms 24 aremounted on a shaft 29 movable in bearing blocks 60. The bearing blocks60 are fastened to a chassis 48 running on rails 49 by means of wheels,respectively rollers 56. At one end of the shafts 29 swivel arms 63 aremounted carrying the guide rollers 27 which act in conjunction with thecam plates 28, as can be seen from FIGS. 10 and 11.

In the raised position of the sealing ring 11 (FIGS. 9 and 10) thecounterweights 25 rest on stops 30. In order to reach the sealingposition, the chassis 48 is moved over the opening of the cooling shaft41, whereby the guide rollers 27 are moved up in the area of cam plates28 and at the same time, due to the rotation of shaft 29, thecounterweights 25 are pulled upwards, whereby the sealing ring 11 islowered in its sealing position. When the reverse motion sequence takesplace the sealing ring is correspondingly lifted again by descending theguide rollers 27 from the cam plates 28 and the chassis 48 returns toits rest position.

In FIGS. 12 to 14 a further embodiment of the coke-feeding device isrepresented, consisting of a stationary hopper 101 to which a movablehopper 201 is assigned. On the stationary hopper 101 a hood lid 431 isfastened as a component of a housing 601. Further the housing 601consists of longitudinal sides 451 and transversal sides 461, which aremovably and sealingly guided at the hood lid 431 and which are equippedwith wheels, respectively rollers 561 running on rails 491 and whichcarry the hopper 201 as well as the lifting and lowering mechanism 15for the cooling shaft closure 8. At one of the side walls 461 thetelescopic linkage 50 of the drive unit 14 is connected, with the aid ofwhich the movable part of housing 601 can be displaced.

FIG. 13 shows a position of the housing 601 wherein the movable hopper201 is shown in work position and the lifting and lowering mechanism 15with the cooling shaft closure 8 is shown in rest position.

In FIG. 14 a position of the housing 601 is shown wherein the liftingand lowering mechanism 15 with the cooling shaft closure 8 is arrangedin sealing position over the cooling shaft 41 and the movable hopper 201has assumed its rest position.

In this embodiment of the coke-feeding device the stationary hopper 101is fitted with a hopper closure 20, formed by two closure plates 64 and65. The actuation device of the hopper closure 20 can be seen from FIG.15. In the example it consists of a lever linkage 66 and a drive 21. Thehopper closure 20 contributes to a further dust emission reduction dueto the fact that when the stationary hopper 101 is closed, the coolingshaft closure 8 can be already opened before the container with theglowing coke is deposited on the stationary hopper 101. After thecooling shaft 41 is charged, the charge container can be lifted offearlier, after a previous closing of hopper 101, without undulyimpairing the suction of dust emissions through the suction line 9 dueto excessive aspiration of secondary air.

We claim:
 1. A coke dry cooling installation comprising:a stationaryhopper for receiving the glowing coke and provided with an outlet;suction means for dust aspiration in said stationary hopper; a coolingshaft spaced from said hopper and formed with a shaft opening receivingthe coke and facing said outlet; rails mounted between the shaft andsaid stationary hopper; a stationary hood surrounding the outlet andextending downwardly toward the rails; a chassis guidable along therails in said hood; another hopper mounted in the hood fixedly on thechassis; actuating means guiding the chassis for displacing the otherhopper toward and away from a working position in which the other hopperreceives the glowing coke from the outlet; a bell mounted on the otherhopper for even distribution of the coke in the cooling shaft; a sealingring movably mounted on the chassis to seal a bottom of the other hopperduring receiving the coke therein, said sealing ring being displaceableto unseal the bottom upon ending of receipt of the coke in the otherhopper; shaft closure means mounted on the chassis to move therewith forsealing the shaft opening upon displacing the other hopper on thechassis from the working position and including:a closure ring, anddisplacing means for lowering the closure ring to seal the shaft openingand for lifting the closure ring; and supply means formed on the hoodfor delivering limited access of secondary air preventing escape of thedust.
 2. The coke dry cooling installation defined in claim 1 whereinthe other hopper further includes:a crossbeam anchored to the otherhopper above the bell, and a pipe segment extending between the bell andthe crossbeam and mounted fixedly thereon to support the bell.
 3. Thecoke dry cooling installation defined in claim 1 wherein the chassis isprovided with means for displacing the sealing ring between a sealingposition corresponding to sealing of the bottom of the other hopper anda rest position, the means for displacing the sealing ring including:aplurality of bearing blocks mounted on the chassis; a couple of spacedapart rotatable shafts mounted on the bearing blocks and extendingbetween the rails, each of the shafts being provided with:a respectivepair of spaced apart rollers, a respective pair of spaced apart leverarms, a respective pair of chains connecting one ends of the lever armsto the sealing ring, a respective pair of counterweights mounted onopposite ends of the lever arms; and a plurality of cam plates along therails engaging the rollers in the working position of the other hopperand forcing the shafts to rotate, so that counterweights are movableupwardly bringing thereby the one ends of the arms along with the chainsand sealing ring downwardly from the rest position to the sealingposition of the sealing ring.
 4. The coke dry cooling installationdefined in claim 1 wherein the stationary hopper is provided with ahopper closure.
 5. The coke dry cooling installation defined in claim 4wherein the closure of the stationary hopper comprises with:a pair ofclosure plates, and a drive provided with a layer linkage connecting thedrive with the plates for displacing the plates between close and openpositions of the closure.
 6. The coke dry cooling installation definedin claim 1 wherein the supply means includes a plurality of openingsformed in the hood.
 7. The coke dry installation defined in claim 1wherein the actuating means includes a telescopic linkage having an endmounted on and urging against the chassis for displacing the chassisalong with the other hopper and shaft closure means.
 8. The coke drycooling installation defined in claim 7 wherein the other hopper furtherincludes a cross-shaped support mounted rigidly on the other hopper andsupporting the bell.
 9. A coke dry cooling installation comprising:astationary hopper for receiving the glowing coke and provided with anoutlet; suction means for dust aspiration in said stationary hopper; acooling shaft spaced from said hopper and formed with a shaft openingreceiving the coke and facing said outlet; rails mounted between theshaft and said stationary hopper; a hood mounted guidably along therails and surrounding the outlet; another hopper mounted in the hood tobe displaceable therewith from a working position of the other hoodcorresponding to receiving the glowing coke from the outlet; actuatingmeans guiding the hood for displacing the other hopper toward and awayfrom the working position thereof; a bell mounted on the other hopperfor even distributing of the coke in the cooling shaft; a sealing ringmovably mounted on the hood to seal a bottom of the other hopper duringreceiving the coke therein, said sealing ring being displaceable tounseal the bottom upon ending of receipt of the coke in the otherhopper; shaft closure means mounted on the hood to move therewith forsealing the shaft opening upon displacing the hood and other hopper fromthe working position and including;a closure ring, and displacing meansfor lowering the closure ring to seal the shaft opening and for liftingthe closure ring; and supply means formed on the hood for deliveringlimited access of secondary air preventing escape of the dust.
 10. Acoke dry cooling installation comprising:a stationary hopper forreceiving the glowing coke and provided with an outlet; suction meansfor dust aspiration in said stationary hopper; a cooling shaft spacedfrom said hopper and formed with a shaft opening receiving the coke andfacing said outlet; rails mounted between the shaft and said stationaryhopper; a stationary hood surrounding the outlet and extendingdownwardly toward the rails so as to leave a bottom clearance; a chassisguidable along the rails in said hood; another hopper mounted in thehood on the chassis; actuating means guiding the chassis for displacingthe other hopper toward and away from a working position thereof inwhich the other hopper receives the glowing coke from the outlet; a bellmounted on the other hopper for even distribution of the coke in thecooling shaft; a sealing ring movably mounted on the chassis to seal abottom of the other hopper during receiving the coke therein, saidsealing ring being displaceable to unseal the bottom of the other hopperupon ending of receipt of the coke in the other hopper; and shaftclosure means mounted on the chassis to move therewith for sealing theshaft opening upon displacing the chassis with the other hopper from theworking position and including:a closure ring, and displacing means forlowering the closure ring to seal the shaft opening and for lifting theclosure ring, wherein the bottom clearance of said hood provides alimited access of secondary air inside the hood to prevent escape of thedust upon charging the glowing coke into the other hopper in the workingposition thereof.